I definitely agree that being mean to the staff (be it cleaning lady, waiter, etc) is a very bad sign of someone's character. That said, if I were cleaning an

I definitely agree that being mean to the staff (be it cleaning lady, waiter, etc) is a very bad sign of someone's character. That said, if I were cleaning an office building I don't think I would want everyone chatting me up - just kindly get out of my way when I'm trying to clean something but otherwise I don't see it as rude to not engage with me when I'm doing my job.